METHOD FOR DERIVING FLOW RATE OF GAS METER AND GAS METER

摘要

PROBLEM TO BE SOLVED: To break excessive flow rate, without influencing pulsation in a gas meter which is formed to be derive an integrated flow rate within a predetermined time from instantaneous flow rates to be measured discretely. ;SOLUTION: The gas meter comprises an integrated flow rate deriving means 12 for deriving the integrated flow rate to be within the predetermined integrated time from instantaneous flow rates to be discretely measured. The meter further comprises a first statistical function deriving means 9 for obtaining a standard deviation σ, representing unevenness among a plurality of instantaneous flow rats from plurality of instantaneous flow rates to be measured within a predetermined integrated time, and an error function deriving means 11 for obtaining an error function from the deviation. Thus, a safety functional flow rate for a safety function is obtained as a difference or a sum of the obtained error function and the integrated flow rate obtained.;COPYRIGHT: (C)2001,JPO